Ear-trumpet.



No. '799,659. PATENTED SEPT. 19, 1.905I

G. G. LBWIS.

BAR TRUMPET.

APPLmAToN FILED MAY 24. 1905.

OOOOOOO OOOOOOOOOOO o OOOOO OOOOOOOOOOOOOOOOO GEORGE GRIFF IN LEVIS, OF SYRACUSE, NEVV YORK.

'EAR-TRUMPET.

Specfication of Letters Patent.

'Patented Sept. 19, 1905.

Application filed May 24, 1905l Serial No. 261,928.

To all whom it may concern:

Be it known that I, GEORGE GRIFFIN Lnws, a citizen of the United States, residing at Syracuse, county of Onondaga, and State of New York, have invented certain new and useful Improvements in Ear Trumpets, of which the following is a specification.

This invention has particular relation to that class of acoustic devices commonly known as ear-trumpets; and the object in view is to provide a novel article of this character that will collect the sound-waves and will properly and strongly augment or concentrate the same and deliver them in this condition to an earpiece.

A further object is to provide a device of this character that is exceedingly simple in construction, not liable to derangement, and, furthermore, can be easily and cheaply manufactured.

One embodiment of the invention is illustrated in the accompanying drawings; but it will be evident that the said invention is not limited solely to this one embodiment.

ln the drawings, Figure 1 is a view in side elevation of the structure Fig. 2 is a longitudinal Sectional view through the same. Fig. 3 is a plan view of the Web-ring, and Fig. 4 is a modified form of cap-support.

In the particular form of structure shown a body is provided consisting of a dished or substantially concavo-convex sound-collecting wall A, and projecting centrally or axially from the convex face thereof'is a sound-conducting tube B, that is offset and curved, as shown, extending to one side of the wall A and having at its free end anipple C, adapted to be inserted in the ear. The particular shape and direction of the conducting-tube is not important, however, and may be varied considerably to suit the different conditions of use. Projecting centrally from the concave side of the wall 'A and axially with respect thereto is a flared mouthpiece or sound-receiver D, the bore or throat of which is in communication with the bore of the tube B, as shown in Fig. 2, and preferably is a continuation of the same.

The open end of the mouthpiece D is covered by a defiector-cap E, the outer face of Which is substantially conical in form, though preferably curved, as illustrated. The inner side of this cap is thus provided with an annular recess or seat F, in which the annular free margin of the mouthpiece is located, said mouthpiece, however, being spaced from the cap. This leavesacentrally inwardly extending nib or projection G, that projects into the mouthpiece and has a centrally disposed needle G,, that is disposed axially within the said mouthpiece. The cap is held in place by a web-ring H, connected to the margin of the cap, above the annular edge thereof, and likewise to the margin of the sound-collecting wall A, this web-ring being provided with perforations I, constituting passage-ways that permit the entry of the sound-waves into the body. The said web-ring is preferably secured to the cap so that an annular margin thereof projects into the body, as shown in Fig. 2, while the other margin of said ring is preferably provided with an inturned fiange H', that fits snugly but detachably within the margin of the body-wall A. Instead of this arrangement of the perforated ringI spaced radial web-strips K may be employed to act as supports, as shown in Fig. 4, wherein the cap-piece is designated L.

ln use the nipple C is introduced into the ear and the body is held with the cap pointing in the direction from which the sound to be heard proceeds. The sound-waves, striking the web, will pass through the perforations thereof, While those which strike the cap will be deflected by the outer curved face thereof to the web. Those entering the body will rebound from the concave side thereof and in turn strike the inner curved face of the cap, and they will thus be detlected inwardly and concentrated in the mouthpiece, passing through the conducting-tube to the ear.

It will thus be seen that a simple article of manufacture is provided, whereby sound will be collected, concentrated, and directed in augmented form to the ear free from disagreeable metallic resonance and confusing sounds of transverse vibrations. Moreover, it will be evident that the device can be inexpensively and easily manufactured and that the various parts are of such a nature that they will not readily become deranged.

The needle G' is useful in directing the sound-waves from the inside of the deflectorcap into the mouthpiece D and at the same time prevents the conflict and revibration of said waves as they leave the inner side of the cap.

vHaving thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a device of the class described, the combination with a body member provided IOO IIO

with a sound-collecting wall, said body member having a sound passage-way opposed to the wall, of a sound-conducting tube having an entrance mouth-opening in the body and in the direction of the passage-way, and a defiector-cap located over the mouth in spaced relation thereto.

2. In a device of the class described, the combination with a sound -collecting bodywall, of a sound-conducting tube having a flaring mouthpiece projecting axially from the inner side of the body-wall, and a deflectorcap located over the mouthpiece.

3..In a device of the class described, the combination with a substantially concavoconvex sound -collecting body-Wall, of a soundconducting tube having a fiaring mouthpiece projecting centrally from the inner face of the wall, and a deflector-cap located centrally over the mouthpiece in spaced relation the'eto and having the face Which is opposed to said mouth curved about the margins of themouthpiece.

4. In a device of the class described, the combination with a substantially concavoconvex soundcollectingI Wall, of a flared mouthpiece projecting centrally from the concave side of the Wall, a conducting-tube connected centrally to the convex side of the wall and in conmunication with the mouthpiece, and means for dcflecting the soundwaves from the collecting-wall to the mouthpiece.

5. In a device of the class described, the combination with a body including a soundcollecting wall, a sound-conducting tube having' a mouthpiece projecting inside the body, a deflcctor located over the mouthpiece, and a web connecting the wall and deflector.

6. In a device of the class described, the

combination with a concave sound-collecting wall, of a sound-conducting tube having' a mouthpiece located Within the space defined by said wall, a defiecto'r located over the mouthpiece, and a perforated Web connecting the margins of the defiector and the wall.

7. In a device 'of the class described, the combination with a sound-collecting body having alsound-receiving side, of a mouthpiece located the-rein and having an open receiving end extending toward the sound-receiving side, a substantially conical cap-piece disposed over the receiving end of the mouthpiece and of less size than the body, said cap-piece constituting a partial closure for the sound-receiving side and means connecting the cappiece and body and permitting the passage of sound into said body.

8. In a device of the class described, the combination with a substantially concavo-convex body-Wall, of a sound-conducting tube connected to the convex side of the wall, a flared mouthpiece connected to the concave side of the wall, a substantially conical cap located over the mouthpiece and having an annular depressed seat that receives the free margins of the mouthpiece, and a web-ring connecting the edges of the cap and of the concavo-convex wall and having perforations therethrough.

9. In a device of the class described, the combination with a sound-collecting Wall, of asound-receiving mouthpiece-associated therewith and having a conducting-tube, and a needle projecting into said mouthpiece.

10. In a device of the class described, the combination with a sound-collecting wall, of a sound receiving mouthpiece projecting therefrom, a cap located over the mouthpiece, a conducting-tube connected With the mouthpiece, and a needle projecting from the cap and extending longitudinally and axially into the mouthpiece.

11. In a device of the .class described, the combination with a sound-collecting body, of

i a sound-receiving mouthpiece opening therein, and means for directing sound-waves to the mouthpiece, said means including a needle supported at one end and disposed in substantial axial relation with respect to the mouthpiece.

12. In a device of the class described, the combination with a sound-collecting body, of a sound-receiving mouthpiece opening therein, a cap located over the mouthpiece and spaced therefrom to permit the passage of sound-waves thereinto, and a needle carried by the cap and disposed in substantial axial relation to the mouthpiece.

In testimony whereof I hercunto alfix my signature in presence of two witnesses.

GEORGE GRIFFIN LEWIS.

Witnesses:

FLoRENcE M. CLARK, Lewis MANCHESTER.

IOO 

